syzbot has found a reproducer for the following issue on: HEAD commit: 2585cf9dfaad Linux 5.16-rc5 git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1034be69b00000 kernel config: https://syzkaller.appspot.com/x/.config?x=44af4fa322f7642f dashboard link: https://syzkaller.appspot.com/bug?extid=4faa160fa96bfba639f8 compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=148458d1b00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=110f6169b00000 Bisection is inconclusive: the issue happens on the oldest tested release. bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=119be2ab900000 final oops: https://syzkaller.appspot.com/x/report.txt?x=139be2ab900000 console output: https://syzkaller.appspot.com/x/log.txt?x=159be2ab900000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+4faa160fa96bfba639f8@xxxxxxxxxxxxxxxxxxxxxxxxx ------------[ cut here ]------------ kernel BUG at fs/ext4/inline.c:755! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 3633 Comm: syz-executor843 Not tainted 5.16.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:ext4_write_inline_data_end+0xa11/0x1120 fs/ext4/inline.c:755 Code: 01 44 89 f6 e8 40 dc 67 ff 41 83 fe 01 0f 87 2a fb ff ff e8 11 da 67 ff 4c 89 e7 e8 79 fe 90 ff e9 9e fb ff ff e8 ff d9 67 ff <0f> 0b e8 f8 d9 67 ff 4c 89 e2 48 b8 00 00 00 00 00 fc ff df 48 c1 RSP: 0018:ffffc9000281f3a8 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000000000 RDX: ffff888076750000 RSI: ffffffff820fd161 RDI: 0000000000000003 RBP: ffff8880737a5c58 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffff820fc907 R11: 0000000000000000 R12: ffffea0001f0d640 R13: 0000000000000001 R14: ffff8880737a5a08 R15: ffffc9000281f400 FS: 00007f57f9ace700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055c0556fbf48 CR3: 000000007a16f000 CR4: 0000000000350ef0 Call Trace: <TASK> ext4_write_end+0x200/0xcf0 fs/ext4/inode.c:1292 ext4_da_write_end+0x375/0x990 fs/ext4/inode.c:3026 generic_perform_write+0x2c6/0x510 mm/filemap.c:3765 ext4_buffered_write_iter+0x1ac/0x3b0 fs/ext4/file.c:269 ext4_file_write_iter+0x423/0x14e0 fs/ext4/file.c:681 call_write_iter include/linux/fs.h:2162 [inline] do_iter_readv_writev+0x472/0x750 fs/read_write.c:725 do_iter_write+0x188/0x710 fs/read_write.c:851 vfs_iter_write+0x70/0xa0 fs/read_write.c:892 iter_file_splice_write+0x723/0xc70 fs/splice.c:689 do_splice_from fs/splice.c:767 [inline] direct_splice_actor+0x110/0x180 fs/splice.c:936 splice_direct_to_actor+0x34b/0x8c0 fs/splice.c:891 do_splice_direct+0x1b3/0x280 fs/splice.c:979 do_sendfile+0xaf2/0x1250 fs/read_write.c:1245 __do_sys_sendfile64 fs/read_write.c:1310 [inline] __se_sys_sendfile64 fs/read_write.c:1296 [inline] __x64_sys_sendfile64+0x1cc/0x210 fs/read_write.c:1296 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f57f9b21de9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f57f9ace2f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 00007f57f9ba74c0 RCX: 00007f57f9b21de9 RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000003 RBP: 00007f57f9b740cc R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000010000 R11: 0000000000000246 R12: 0030656c69662f2e R13: 00007f57f9b730c8 R14: 0000000300000002 R15: 00007f57f9ba74c8 </TASK> Modules linked in: ---[ end trace e6a45f74f6d725ce ]--- RIP: 0010:ext4_write_inline_data_end+0xa11/0x1120 fs/ext4/inline.c:755 Code: 01 44 89 f6 e8 40 dc 67 ff 41 83 fe 01 0f 87 2a fb ff ff e8 11 da 67 ff 4c 89 e7 e8 79 fe 90 ff e9 9e fb ff ff e8 ff d9 67 ff <0f> 0b e8 f8 d9 67 ff 4c 89 e2 48 b8 00 00 00 00 00 fc ff df 48 c1 RSP: 0018:ffffc9000281f3a8 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000000000 RDX: ffff888076750000 RSI: ffffffff820fd161 RDI: 0000000000000003 RBP: ffff8880737a5c58 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffff820fc907 R11: 0000000000000000 R12: ffffea0001f0d640 R13: 0000000000000001 R14: ffff8880737a5a08 R15: ffffc9000281f400 FS: 00007f57f9ace700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f57f9aad718 CR3: 000000007a16f000 CR4: 0000000000350ef0
